1. L. Visscher, H. J. Aa. Jensen, and T. Saue, with new contributions from R. Bast, S. Dubillard, K. G. Dial, U. Ekström, E. Eliav, T. Fleig, A. S. P. Gomes, T. U. Helgaker, J. Henriksson, M. Iliaš, Ch. R. Jacob, S. Knecht, P. Norman, J. Olsen, M. Pernpointner, K. Ruud, P. Sałek, J. Sikkema, DIRAC, a relativistic ab initio electronic structure program, release DIRAC08, 2008 .
2. Introduction to Relativistic Quantum Chemistry;Dyall,2007
3. Optical Spectroscopy of Lanthanides: Magnetic and Hyperfine Interactions;Wybourne,2007
4. Atomic Structure Theory;Johnson,2007
5. Relativistic Quantum Chemistry;Reiher,2009